Collisions
Mostrando 1-12 de 292 artigos, teses e dissertações.
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1. A origem clássica da força do oscilador
Resumo O conceito de força do oscilador é útil em várias áreas da química e da física, tais como emissão e absorção de radiação, constante dielétrica, índice de refração e colisões inelásticas entre partículas carregadas e átomos e moléculas. Na maioria dos livros didáticos, o conceito de força de oscilador é introduzido de forma ad h
Rev. Bras. Ensino Fís.. Publicado em: 07/10/2019
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2. Interactions between cetaceans and artisanal fishermen from Ilhéus, Bahia - Brazil
Resumo: Estudos etnobiológicos são necessários para conhecer as relações entre pescadores e cetáceos. O objetivo deste trabalho foi descrever as interações entre cetáceos e pescadores artesanais e possíveis conflitos decorrentes destas. Entrevistas semiestruturadas foram aplicadas de fevereiro a setembro de 2017 a 35 pescadores do município de Ilh
Biota Neotrop.. Publicado em: 05/09/2019
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3. Modeling and Experimental Validation of Two Adjacent Portal Frame Structures Subjected to Vibro-impact
Abstract In many engineering applications, there are systems that exhibit a series of collisions in a certain amount of time, for example the impact of floating ice in ships and the rubbing between stationary and rotary parts in turbomachinery. In many of these situations, it is of vital importance to know how the impacts affect the overall system behavior f
Lat. Am. j. solids struct.. Publicado em: 08/04/2019
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4. Assessing driving risk in patients with glaucoma
RESUMO O glaucoma é a principal causa de cegueira irreversível em todo o mundo e pode afetar uma ampla gama de atividades diárias, incluindo a direção veicular. Recentemente, estudos que investigam a relação entre o desempenho na condução veicular e o glaucoma têm recebido grande interesse. A avaliação do comportamento de dirigir não é direta p
Arq. Bras. Oftalmol.. Publicado em: 25/03/2019
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5. Espuma ultraliviana de Mg a partir de viruta reciclada
ABSTRACT Hundreds of people worldwide die or are severely maimed in collisions during traffic accidents, due to the energy transmitted to the passengers on impact. A dissipation of said energy is necessary to minimize it's effects, which can be achieved through absorbers. In recent years, metallic foams have started to be considered as energy absorbers. Meta
Matéria (Rio J.). Publicado em: 19/07/2018
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6. An Overview of Research into Low Internal Friction Optical Coatings by the Gravitational Wave Detection Community
The direct detection of gravitational waves by ground-based interferometric gravitational wave detectors in recent years has opened a new window of the universe, allowing the astrophysical observations of previously unexplored phenomena, such as the collisions of black holes and neutron stars. However, small thermodynamic fluctuations of the density of the t
Mat. Res.. Publicado em: 24/05/2018
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7. Aspecto médico veterinário legal das lesões em aves silvestres promovidas por colisões com aeronaves
ABSTRACT The objective of this study was to describe lesions in four birds, victims of collisions with aircraft, coming from the International Airport of Recife/Guararapes Gilberto Freyre, Pernambuco, Brazil. Contused wounds were predominant in birds in this study, characterized by the presence of fractures, bruises and hematomas and justified by the blunt a
Arq. Bras. Med. Vet. Zootec.. Publicado em: 2018-01
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8. Influence of agitation intensity on flotation rate of apatite particles
Abstract The agitation intensity has a directly influence on flotation performance, lifting the particles and promoting the contact of bubbles and particles. In this paper, the energy input by the agitation on apatite flotation was investigated. The influence of pulp agitation in the flotation rate of particles with different sizes and two dosage levels was
REM, Int. Eng. J.. Publicado em: 2017-12
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9. Relationship between bird-of-prey decals and bird-window collisions on a Brazilian university campus
ABSTRACT Bird-window collisions are a dramatic cause of bird mortality globally. In Latin America, statistics are generally very scarce and/or inaccessible so the frequency of such incidents is still poorly understood. Nevertheless, civilians have applied preventive methods (e.g. adhesive bird-of-prey decals) sparsely but, to our knowledge, no study has eval
Zoologia (Curitiba). Publicado em: 19/10/2017
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10. Analysis of Structural Crashworthiness and Estimating Safety Limit Accounting for Ship Collisions on Strait Territory
Abstract A series of analyses are carried out to predict the structural crashworthiness of a ship during a collision. The numerical configuration is verified by structural simulations based on a laboratory experiment wherein a penetration test is considered as the experimental reference. Comparative observations of structural behaviour are carefully conducte
Lat. Am. j. solids struct.. Publicado em: 2017-08
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11. DLC Films Grown On Steel Using An Innovator Active Screen System For PECVD Technique
In this work, an active screen plasma discharge system based technology was incorporated in a PECVD reactor for DLC films growth, making it a new development in DLC films deposition. In this case, the active screen system is used to seek better electrons confinement, which might result in high ions density due to the collisions number increase, leading to a
Mat. Res.. Publicado em: 07/07/2016
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12. Concrete road barriers subjected to impact loads: An overview
Abstract Concrete barriers prevent vehicles from entering the opposite lane and going off the road. An important factor in the design of concrete barriers is impact load, which a vehicle exerts upon collision with a concrete barrier. This study suggests that a height of 813 mm, a base width of 600 mm, and a top width of 240 mm are optimum dimensions for a co
Lat. Am. j. solids struct.. Publicado em: 2015-10